from wiki, yes the 250C all had 2.8 M130 engine
W114
Chassis code Years Model Engine Number built[6]
Displacement Model Type
W114.015 1968–1976 230, 230.6 2.3 L M180 I6 221,783
W114.01333 1968–1972 250 2.5 L M114 I6 78,303
W114.011 1972–1976 250 2.8 2.8 L M130 I6 34,061
W114.023/022 1969–1976 250C/CE 2.8 L M130 I6 42,379
W114.060/062 1972–1976 280/E 2.8 L M110 I6 67,373
W114.073/072 1972–1976 280C/CE 2.8 L M110 I6 24,669
W114
Chassis code Years Model Engine Number built[6]
Displacement Model Type
W114.015 1968–1976 230, 230.6 2.3 L M180 I6 221,783
W114.01333 1968–1972 250 2.5 L M114 I6 78,303
W114.011 1972–1976 250 2.8 2.8 L M130 I6 34,061
W114.023/022 1969–1976 250C/CE 2.8 L M130 I6 42,379
W114.060/062 1972–1976 280/E 2.8 L M110 I6 67,373
W114.073/072 1972–1976 280C/CE 2.8 L M110 I6 24,669
